diff options
Diffstat (limited to 'arch/x86/kernel/cpu/perf_event_intel.c')
-rw-r--r-- | arch/x86/kernel/cpu/perf_event_intel.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/x86/kernel/cpu/perf_event_intel.c b/arch/x86/kernel/cpu/perf_event_intel.c index adb02aa62af5..07846d738bdb 100644 --- a/arch/x86/kernel/cpu/perf_event_intel.c +++ b/arch/x86/kernel/cpu/perf_event_intel.c | |||
@@ -1382,6 +1382,15 @@ again: | |||
1382 | intel_pmu_lbr_read(); | 1382 | intel_pmu_lbr_read(); |
1383 | 1383 | ||
1384 | /* | 1384 | /* |
1385 | * CondChgd bit 63 doesn't mean any overflow status. Ignore | ||
1386 | * and clear the bit. | ||
1387 | */ | ||
1388 | if (__test_and_clear_bit(63, (unsigned long *)&status)) { | ||
1389 | if (!status) | ||
1390 | goto done; | ||
1391 | } | ||
1392 | |||
1393 | /* | ||
1385 | * PEBS overflow sets bit 62 in the global status register | 1394 | * PEBS overflow sets bit 62 in the global status register |
1386 | */ | 1395 | */ |
1387 | if (__test_and_clear_bit(62, (unsigned long *)&status)) { | 1396 | if (__test_and_clear_bit(62, (unsigned long *)&status)) { |